Medicine and Health Sciences Commons^™

Agreeability Of Actigraph And Activpal 4™ Measures Of Vigorous Activity, Hannah Sandstrom, Barry Francis, Alyssa Thomas, Sthefany Diaz Orduz, Bre Mcdonald, Sophia Ramirez

Symposium of Student Scholars

Key Words: Accelerometry, activPal 4™, ActiGraph, RPE, HR

Introduction: Wearable technologies are consistently used in research to track physical activity and study how it can improve overall health. ActiGraph and activPal are research-grade accelerometers that track activity levels of all intensities in humans. ActivPal has recently improved its technology to measure vigorous activity more accurately to be consistent with the gold standard Actigraph measures. The purpose of this study is to test the agreeability between the vigorous activity measures of the ActiGraph and activPal 4™ devices. Methods: Regular exercisers are being recruited from the KSU Department of Exercise Science and …

Fatigue-Induced Sex Differences For Explosive Neuromuscular Characteristics Of The Plantar Flexors, Ben Dalton

Symposium of Student Scholars

Previous research on fatigue using isometric contractions suggests that females are more fatigue resistant than males, but less is clear regarding fatigue induced by dynamic contractions. PURPOSE: To determine sex differences for explosive voluntary neuromuscular characteristics of the plantar flexors (PFs) during a dynamic fatiguing task. METHODS: Recreationally active males (n=14; 22.4±2.2 yrs) and females (n=15; 20.9±2.5 yrs) performed a fatiguing task of the PFs consisting of 60 maximal isotonic contractions at 30% of their maximal isometric strength using a dynamometer. Peak power (PP), optimal velocity (OV), and optimal torque (OT) were calculated from the first five contractions of the …

Sex Differences In Plantar Flexor Strength And Contractile Properties After Isometric And Dynamic Fatigue, Phuong Ha, Benjamin E. Dalton, Michaela G. Alesi, Tyler M. Smith, Trisha A. Vandusseldorp, Yuri Feito, Anna G. Conroy, Garrett M. Hester

Symposium of Student Scholars

Purpose: To determine sex differences in strength and contractile properties after isometric and dynamic fatiguing exercise of the plantar flexors. Methods: Recreationally active males (n=13, age=22.4±2.2 yrs) and females (n=15, age=20.9±2.4 yrs) performed a maximal isometric (2 min) and isotonic (120 reps at 30% peak torque) fatigue task on 2 separate visits. Before and after each fatigue task, participants performed a 3 sec maximal voluntary isometric contraction (MVIC) with tibial nerve stimulation being delivered during and immediately after the MVIC. Peak torque (PT; highest 250 ms) was obtained during the voluntary phase of the MVIC. Peak twitch torque …

Are There Predictors Of A Running Back’S Success?, Joshua Price

Symposium of Student Scholars

People who analyze football have concentrated in the past on a running back’s 40-yard dash, shuffle, broad jump, vertical jump, and bench press measures. My research will test if the following variables can predict a running back’s success in the NFL: height, weight, conference, offensive line ranking for their team, the running back’s total yards for the season, their average yards for each attempt, the number of times the running back has entered the end zone for a touchdown that season, the running back’s time average time behind the line of scrimmage (TLOS), the percentage of times the running back …

Age-Related Differences In Absolute And Relative Maximal Strength At Different Velocities, Michael Cooper

Symposium of Student Scholars

Introduction: Examining peak torque (PT) relative to muscle size provides insight on qualitative factors (e.g., fiber type composition, muscle activation) that are influential for maximal strength, yet data is scarcer for higher velocity contractions. Acceleration (ACC) has been proposed to be influenced by similar physiological factors. Purpose: To examine absolute and relative PT, as well as ACC at different velocities in young (YM) and older (OM) males. Methods: Healthy, YM (n=15, age=20.7±2.2 yrs) and OM (n=15, age=71.6±3.9 yrs) performed maximal voluntary contractions at 0°⋅s^-1 (isometric), 60°⋅s^-1, and 180°⋅s^-1 using a dynamometer. Ultrasonography was used to obtain …

Recovery Of Peak Torque After Fatiguing Explosive And Slow Maximal Muscle Contractions: Preliminary Findings, Michael Cooper

Symposium of Student Scholars

The unique neuromuscular strategies for explosive and slow muscle contractions may result in differing rates of recovery for peak muscle torque (PT) upon cessation of fatiguing exercise involving these contraction types. PURPOSE: The purpose of this study was to examine the recovery of PT after explosive and slow fatiguing muscle contractions. METHODS: Following a familiarization visit, recreationally active males (n=4, age=23.3±2.2 years) were randomly assigned to perform fatiguing exercise consisting of either explosive (RAPID) or slow (RAMP) maximal voluntary isometric contractions (MVICs) on separate visits. Each protocol consisted of repeated 5 s MVICs of the quadriceps, with an explosive intent …